Hello Shyam,1) Birth certificate: You cannot put other documents. You can try to get Birth certificate in English or you must provide a copy of the document(Local Language) and a complete, certified or notarized translation of the document which will be in English.
2) You will require reference letter with detailed job roles and responsibilities. Get a letter from you supervisor for your roles and responsibilities, get it notarized. Salary statement, appraisal letter and bank statements are required, as to support that your job is paid job and you are not working for free.
Thank you for your continuous and unlimited support. Regarding Point 2 - I got Ref Letter signed by my direct manager, however, I can't get it notarized. I have it on the company letterhead with my manager's details and the company stamp .. is this enough?
Also, for the bank statement, for my first job I received the first 4 months salary in cash as my residency was not transferred yet to my employer then and they can not transfer anyone to my account because it is against the ministries regulations ( I have the offer and Ref. Letter as well) but can't convince them to issue a letter for this case ?